.top-bc {
  margin-top: 72px;
  background: rgba(0, 0, 0, 0.3);
}
.banner {
  position: relative;
  height: 500px;
}
.banner .img-banner {
  width: 100%;
}
.banner .swiper-container {
  width: 100%;
  height: 100%;
  background-color: #b3bdc4;
  transition: 1s background-color 1.3s;
}
.banner .swiper-wrapper {
  transition-delay: 1s;
  transition-timing-function: cubic-bezier(0.5, 0, 0, 1);
}
.banner .swiper-slide {
  text-align: center;
  font-size: 18px;
  /* Center slide text vertically */
  display: -webkit-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  -webkit-align-items: center;
  align-items: center;
}
.banner .title {
  transition-delay: 1s;
  z-index: 10;
}
.banner .title h3 {
  font-weight: 700;
  font-size: calc(55px + 54 * ((53vw + 53vh) - 520px) / 820);
  letter-spacing: -1px;
  color: rgba(255, 255, 255, 0);
  -webkit-text-stroke: 2px #fff;
}
.banner .img-box {
  width: 100%;
  height: 100%;
  position: absolute;
  transform: scale(0.6, 0.6);
  transition-duration: 1s;
  transition-property: transform;
  transition-timing-function: cubic-bezier(0.5, 0, 0, 1);
  opacity: 0.9;
  overflow: hidden;
}
.banner .img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.2, 1.2) translateX(50%);
  transition-timing-function: cubic-bezier(0.5, 0, 0, 1);
  transition-property: transform;
}
.banner .button-prev,
.banner .button-next {
  transition: 0.5s;
  outline: none;
  position: absolute;
  width: 140px;
  z-index: 10;
  top: 65vh;
  transform: translateY(-34px);
  cursor: pointer;
}
.banner .button-prev {
  left: 4vw;
}
.banner .button-next {
  right: 4vw;
}
.banner .button.disabled {
  opacity: 0.2;
  cursor: default;
}
.banner #arrow-svg-home {
  transform: translateY(353px);
}
.banner .button-next #arrow-svg-home {
  transform: translateY(353px) rotateY(180deg);
  transform-origin: 80px 0px 0px;
}
.banner svg {
  transition: 0.5s;
}
.banner .cls-1 {
  transition: 0.5s;
  opacity: 0.4;
  transform-origin: -20px 40px;
  opacity: 1;
}
.banner .cls-4 {
  transition: 0.5s;
  stroke-width: 2px;
  stroke: #fff;
  fill: none;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  opacity: 0.4;
  transform-origin: 0px 0px 0px;
}
.banner #arrow-trg {
  transition: 0.5s;
  fill: #fff;
  transform: rotateY(180deg) translate(-53px, 39px);
}
.banner #line {
  transition: 0.5s;
  stroke: #fff;
  transform: translate(50px, 42px);
}
.banner .button-prev:not(.disabled):hover svg {
  transform: translateX(-25px);
}
.banner .button-next:not(.disabled):hover svg {
  transform: translateX(25px);
}
.banner .button:not(.disabled):hover .cls-1 {
  transform: scale(1.1);
}
.banner .button:not(.disabled):hover .cls-4 {
  stroke-dasharray: 2px;
  stroke-dashoffset: 2px;
  opacity: 1;
}
.banner .button:not(.disabled):hover #arrow-trg {
  transform: rotateY(180deg) translate(-37px, 39px);
}
.banner .button:not(.disabled):hover #line {
  transform: translate(35px, 42px) scaleX(0.33);
}
.main-top {
  margin-top: 15px;
}
.main-top h3 {
  display: block;
  border-top: 2px solid #E2E2E2;
  height: 70px;
  line-height: 70px;
  text-align: center;
  font-size: 20px;
  color: #333333;
}
.main-top .m-side {
  float: left;
  padding: 15px;
  margin-left: 50px;
  width: 500px;
  transform: rotate(2deg);
  box-shadow: 1px 1px 4px #333333;
}
.main-top .m-side img {
  width: 100%;
}
.main-top .main-right {
  width: 400px;
  margin-top: 80px;
  margin-left: 650px;
}
.main h3 {
  border-bottom: 1px solid #FFFF00;
}
.main .m2-side {
  float: right;
  padding: 15px;
  margin-right: 50px;
  width: 500px;
  height: 400px;
}
.main .m2-side img {
  margin-left: 20px;
  width: 100%;
  height: 100%;
}
.main .m2-side .swiper-container {
  width: 100%;
  height: 100%;
}
.main .m2-side .swiper-wrapper {
  /* 通过改变animation-timing-function 制作弹性切换效果 */
  transition: 2s cubic-bezier(0.68, -0.4, 0.27, 1.34) 0.2s;
}
.main .m2-side .swiper-slide {
  text-align: center;
  font-size: 18px;
  background: #fff;
  /* Center slide text vertically */
  display: -webkit-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  -webkit-align-items: center;
  align-items: center;
}
.main .ma-left {
  width: 400px;
  margin-top: 80px;
  margin-left: 100px;
}
